php的3des兼容c#

2017-05-03 08:30:33 256 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

用CryptoJS 实现js端3des加密和解密，用openssl_encrypt实现php的3des加密解密，兼容java和C#和c++等因为要开发社交平台，涉及到聊天内容，这些敏感内容想用3des加密传输，百度了好多资料，测试了好多次，终于实现了功能，可以直接使用，这里写下来，希望帮助到其他朋友。听说微信小程序需要数据加密，相信这个能帮到大家。这里说一下，iv向量一般是8位，我的php版本是5.5.12 我原来用mcrypt_decrypt的时候，有的iv长度要8位，有的要16位... 阅读详情

有份c#的源码如下（我写过不少php和别的代码的加解密对接，不过这份和c#的3des对接一直没搞定，看了下我觉得是c#的这里面用的base64和php的编码不太一样，但是无从下手，请教大神们有能解决的）：

public class Des3  

{  

    #region CBC模式**  

    /// <summary>  

    /// DES3 CBC模式加密  

    /// </summary>  

    /// <param name="key">密钥</param>  

    /// <param name="iv">IV</param>  

    /// <param name="data">明文的byte数组</param>  

    /// <returns>密文的byte数组</returns>  

    public static byte[] Des3EncodeCBC( byte[] key, byte[] iv, byte[] data )  

    {  

        //复制于MSDN  

        try  

        {  

            // Create a MemoryStream.  

            MemoryStream mStream = new MemoryStream();  

            TripleDESCryptoServiceProvider tdsp = new TripleDESCryptoServiceProvider();  

            tdsp.Mode = CipherMode.CBC;             //默认值  

            tdsp.Padding = PaddingMode.PKCS7;       //默认值  

            // Create a CryptoStream using the MemoryStream   

            // and the passed key and initialization vector (IV).  

            CryptoStream cStream = new CryptoStream( mStream,  

                tdsp.CreateEncryptor( key, iv ),  

                CryptoStreamMode.Write );  

            // Write the byte array to the crypto stream and flush it.  

            cStream.Write( data, 0, data.Length );  

            cStream.FlushFinalBlock();  

            // Get an array of bytes from the   

            // MemoryStream that holds the   

            // encrypted data.  

            byte[] ret = mStream.ToArray();  

            // Close the streams.  

            cStream.Close();  

            mStream.Close();  

            // Return the encrypted buffer.  

            return ret;  

        }  

        catch ( CryptographicException e )  

        {  

            Console.WriteLine( "A Cryptographic error occurred: {0}", e.Message );  

            return null;  

        }  

    }  

    /// <summary>  

    /// DES3 CBC模式解密  

    /// </summary>  

    /// <param name="key">密钥</param>  

    /// <param name="iv">IV</param>  

    /// <param name="data">密文的byte数组</param>  

    /// <returns>明文的byte数组</returns>  

    public static byte[] Des3DecodeCBC( byte[] key, byte[] iv, byte[] data )  

    {  

        try  

        {  

            // Create a new MemoryStream using the passed   

            // array of encrypted data.  

            MemoryStream msDecrypt = new MemoryStream( data );  

            TripleDESCryptoServiceProvider tdsp = new TripleDESCryptoServiceProvider();  

            tdsp.Mode = CipherMode.CBC;  

            tdsp.Padding = PaddingMode.PKCS7;  

            // Create a CryptoStream using the MemoryStream   

            // and the passed key and initialization vector (IV).  

            CryptoStream csDecrypt = new CryptoStream( msDecrypt,  

                tdsp.CreateDecryptor( key, iv ),  

                CryptoStreamMode.Read );  

            // Create buffer to hold the decrypted data.  

            byte[] fromEncrypt = new byte[data.Length];  

            // Read the decrypted data out of the crypto stream  

            // and place it into the temporary buffer.  

            csDecrypt.Read( fromEncrypt, 0, fromEncrypt.Length );  

            //Convert the buffer into a string and return it.  

            return fromEncrypt;  

        }  

        catch ( CryptographicException e )  

        {  

            Console.WriteLine( "A Cryptographic error occurred: {0}", e.Message );  

            return null;  

        }  

    }  

    #endregion  

    /// <summary>  

    /// 类测试  

    /// </summary>  

    public static void Test()  

    {  

        System.Text.Encoding utf8 = System.Text.Encoding.UTF8;  

        //key为abcdefghijklmnopqrstuvwx的Base64编码  

        byte[] key = Convert.FromBase64String( "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4" );  

        byte[] iv = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 };      //当模式为ECB时，IV无用  

        byte[] data = utf8.GetBytes( "中国ABCabc123" );  

        System.Console.WriteLine( "ECB模式:" );  

        byte[] str1 = Des3.Des3EncodeECB( key, iv, data );  

        byte[] str2 = Des3.Des3DecodeECB( key, iv, str1 );  

        System.Console.WriteLine( Convert.ToBase64String( str1 ) );  

        System.Console.WriteLine( System.Text.Encoding.UTF8.GetString( str2 ) );  

        System.Console.WriteLine();  

        System.Console.WriteLine( "CBC模式:" );  

        byte[] str3 = Des3.Des3EncodeCBC( key, iv, data );  

        byte[] str4 = Des3.Des3DecodeCBC( key, iv, str3 );  

        System.Console.WriteLine( Convert.ToBase64String( str3 ) );  

        System.Console.WriteLine( utf8.GetString( str4 ) );  

        System.Console.WriteLine();  

    }  

}